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TI extends three-phase smart e-meter SoC portfolio

Posted: 09 Jun 2014     Print Version  Bookmark and Share

Keywords:Texas Instruments  ADC  smart meter  SoC  energy measurement 

Texas Instruments (TI) has unleashed a line of three-phase metering SoC for smart electricity meters and portable measurement applications. According to the company, the MSP430F67641 SoCs include high-performance delta-sigma ADCs for energy measurement products requiring high accuracy across a wide dynamic range. An integrated 320-segment LCD cuts the need for external drivers and enables developers to create the next generation of smart energy measurement devices with detailed displays and extended language support, while still maintaining low-power consumption in sleep mode.


In addition, the MSP430F6779A metering SoCs include advanced security and electrostatic discharge (ESD) features. A 128bit advanced encryption standard (AES) hardware-accelerated module speeds encryption time, improves meter security and performance. With more flash memory integrated on-chip, smart grid developers can incorporate more sophisticated metering features such as multi-dwelling dynamic pricing, large buffers for interval data, DLMS/COSEM for metre data formatting, and communication stacks for both wired and wireless protocols.

Developers will also benefit from TI's TPS54060 step-down converter that provides a regulated DC supply of 3.3V with low quiescent current to ensure full-speed operation of the MSP430F67641 and MSP430F6779A devices, noted the company.

According to the company, MSP430F67641 devices provide 0.5 per cent accuracy and MSP430F6779A devices provide Class 0.1 accuracy across a 2000:1 dynamic range through -40°C to 85°C. A free Energy Library code performs all of the energy and power calculations required for ANSI/IEC qualified metres and provides an easy starting point for customers developing utility meter products. Additionally, MSP430F67641 SoCs offer multiple low-power modes and power consumption as low as 0.78uA for developers needing to design ultra-low power metering devices.

Simultaneous sampling of the on-chip 10bit successive approximation (SAR) ADC with the delta-sigma ADCs eliminates software compensation for sequential sampling, which helps developers reduce the size of software code. Integrated on-chip memory (128KB flash on MSP430F67641 and 512KB flash on MSP430F6779A) allow developers to include communication stacks for both wired and wireless protocols, including ZigBee, wM-Bus, power line communication (PRIME, G3-PLC, IEEE-P1901.2) and RF mesh networks.

TI's MSP430F67641 SoCs are available for $2.85 in 1K units. Additionally, several development kits are available for engineers to kick start their development, including the MSP-TS430PEU128 programming and debug board ($117), MSP-FET430U128 flash emulation tool ($175), EVM430-F67641 evaluation module ($299). The MSP430F6779A metering SoCs are available for $6.90 in 1K units with the EVM430-F6779 evaluation module for $299.

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